Free online calculators and file tools
Fast, private, browser-based tools. No sign-up and no uploads — every calculator runs instantly on your own device, and nothing you type or drop in ever leaves your computer.
UK VAT Calculator
Add or remove UK VAT at 20%, 5% or 0% in one click. See net, VAT and gross amounts instantly, with reverse VAT calculation and worked examples.
Open tool →US Sales Tax Calculator
Calculate US sales tax by state instantly. Add tax to a pre-tax amount or reverse it out of a total, with state-level rates and worked examples.
Open tool →AdSense Revenue Calculator
Estimate your Google AdSense income from pageviews, CTR and CPC. See daily, monthly and yearly earnings projections with realistic RPM benchmarks.
Open tool →Hourly to Salary Calculator
Convert hourly pay to annual, monthly and weekly salary in seconds. Defaults to 40-hour weeks and 52 weeks, with easy adjustments for unpaid time off.
Open tool →Discount Calculator
Work out how much you save and the final price after any percent-off discount, optionally with sales tax added, plus double-discount examples.
Open tool →Image Compressor
Compress JPG, PNG and WebP images directly in your browser. Reduce file size for email, web or storage — no uploads, no sign-up, completely free.
Open tool →Image Converter
Convert images between PNG, JPG and WebP right in your browser. Fast, private and free — files never leave your device.
Open tool →Image Resizer
Resize images to exact dimensions in your browser with aspect-ratio locking. Perfect for avatars, thumbnails and web graphics — no uploads.
Open tool →Image to PDF
Combine JPG, PNG and WebP images into a single PDF in your browser. One image per page, any order, no uploads and completely free.
Open tool →PDF Merger
Merge multiple PDF files into one document in your browser. Drag, drop and combine in seconds — private, free, with no uploads.
Open tool →PDF Splitter
Split a PDF by page range directly in your browser. Extract the pages you need into a new PDF — fast, private and completely free.
Open tool →Reverse VAT Calculator
Take UK VAT back out of a gross amount instantly. Enter any total at 20%, 5% or 0% and see the net price and VAT content, with the formula shown.
Open tool →EU VAT Calculator
Add or remove VAT at the standard rate for any of the 27 EU countries. Pick a country, enter an amount and get net, VAT and gross instantly.
Open tool →Reverse Sales Tax Calculator
Back the sales tax out of any US receipt. Enter a total and a state to see the pre-tax price and the tax it contains, at the state's base rate.
Open tool →Salary to Hourly Calculator
Convert an annual salary into an hourly, daily, weekly and monthly rate. Adjust hours and weeks to see what your salary really pays per hour.
Open tool →Percentage Calculator
Three percentage tools in one: find X% of a number, work out what percent X is of Y, and calculate the percent change between two values.
Open tool →
Why Toolsite?
Most calculator sites bury the tool under walls of ads and send your data to a server before showing an answer. We do the opposite: the tool comes first, results update as you type, and every calculation is done locally with plain JavaScript. The tax rates we ship are checked against official sources, and each page shows the formula behind the numbers so you can verify the maths yourself.
- Instant results while you type — no submit button, no page reloads
- Works offline once the page has loaded
- Clear formulas, worked examples and honest FAQs on every page
- More image and PDF tools arriving soon